Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
  • H04W52/02—Power saving arrangements
  • H04W52/0209—Power saving arrangements in terminal devices
  • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
  • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
  • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
  • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
  • H04W16/08—Load shedding arrangements
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
  • H04W52/02—Power saving arrangements
  • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
  • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
  • H04W52/04—TPC
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
  • H04W16/24—Cell structures
  • H04W16/32—Hierarchical cell structures
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W24/00—Supervisory, monitoring or testing arrangements
  • H04W24/02—Arrangements for optimising operational condition
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/02—Traffic management, e.g. flow control or congestion control
  • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
  • Y02D30/00—Reducing energy consumption in communication networks
  • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

• the embodiments of the present invention relate to communication technologies, and in particular, to a method, a device, and a wireless communication system for base station device activation and power control. Background technique
• the operator When deploying a wireless network in an area, the operator often deploys a heterogeneous or homogeneous inter-frequency point network or deploys a capacity station in a hotspot area for service upgrade and capacity enhancement based on providing basic network coverage.
• a base station that provides basic network coverage as a coverage station
• a base station or hotspot station that performs service upgrade or capacity enhancement and overlaps coverage with the coverage station is a capacity station.
• the existing capacity station activation scheme may have the following problems when applying, that is, after multiple capacity stations are activated at the same time and operate at the maximum power transmission level, the coverage station load may drop to a very low level or even at a zero load state. In fact, this is not conducive to the overall energy efficiency of the network. Summary of the invention
• the embodiment of the invention provides a method for capacity station activation to more accurately determine a capacity station that needs to be activated, and can control the transmission power of the activated capacity station and reduce the energy consumption of the entire system.
• a method of capacity station activation comprising: Transmitting, to the capacity station, first activation control information, wherein the first activation control information is used to cause the capacity station to send a pilot signal to a user in a linked state with the coverage station by using the first transmission power, the capacity station belongs to the Receiving a first measurement result of the pilot signal by the user, determining, according to the first measurement result, a capacity station that needs to be activated to meet a system requirement; and transmitting activation information to the capacity station that needs to be activated The capacity station that needs to be activated is activated to operate at the first transmission power;
• the capacity station that needs to be activated to meet the system requirement cannot be selected according to the first measurement result, sending, to the capacity station, second activation control information, where the second control information is used to enable the capacity station to use the second transmission power Transmitting a pilot signal to a user in a linked state with the overlay station; receiving a second measurement result of the pilot signal by the user, determining the capacity station that needs to be activated according to the second measurement result;
• the activated capacity station transmits activation information such that the capacity station that needs to be activated is activated to operate at the second transmission power;
• the first control transmit power is less than the second transmit power.
• a wireless communication system including a capacity station and a coverage station, the capacity station being attributed to the coverage station, the capacity station including at least two levels of transmit power,
• the coverage station is configured to send a plurality of activation control information to the capacity station, the multiple activation control information causing the capacity station to transmit a pilot signal to a user in a power-increasing manner, and receiving the user-paired Deriving a measurement result of the pilot signal, determining, according to the measurement result, a capacity station that needs to be activated to meet the system requirement, and transmitting activation information to the determined capacity station that needs to be activated;
• the capacity station is configured to receive activation control information of the coverage station, and send a pilot signal to the user in a manner of increasing transmission power until the coverage station determines a capacity station that needs to be activated to meet system requirements, and is also used to sleep. Receiving the activation information sent by the coverage station and converting to the working state, and operating the power of the pilot signal when the capacity station that needs to be activated determined by the coverage station transmits the activation information.
• the embodiment of the present invention further provides a wireless communication base station, including: a sending unit, configured to send, to the capacity station that belongs to the base station, multiple activation control information, where the multiple activation control information is used to enable the The capacity station sends a pilot signal to the user in a power-increasing manner; the receiving unit is configured to receive the measurement result that the user sends the pilot signal;
• a calculating unit configured to determine, according to the measurement result of the pilot signal sent by the user, a capacity station that needs to be activated to meet a system requirement, and send, by the sending unit, the activation information to the capacity station that needs to be activated, so as to be in a dormant state
• the capacity station that needs to be activated is transformed into an active state, and the power of the pilot station is transmitted when the capacity station that needs to be activated determined by the coverage station transmits activation information.
• the pilot station transmits the pilot signal in a power-increasing manner to perform capacity station activation, and determines a suitable transmission power according to the measurement of the pilot signal by the user, so that the capacity station may work below after activation.
• FIG. 1 is a flow chart of a method for activating a capacity station according to an embodiment of the present invention.
• FIG. 2 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
• FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
• the capacity station uses at least two pilot transmit powers, respectively, in the activation decision process.
• w and P max where P max may be the maximum transmit power of the hotspot station pilot, &. w is a preset power level below P max .
• P max may be the maximum transmit power of the hotspot station pilot
• &. w is a preset power level below P max .
• the hotspot station can adopt more grades of pilot transmission power, wherein the highest level of transmission power is preferably a hotspot.
• the station pilot transmits the maximum power, and the implementation medium capacity station adjusts the pilot transmission power in increments of three ways until the coverage station determines the appropriate capacity station to be activated.
• the hotspot station is a capacity station and the macro base station is an overlay station.
• the coverage station and the capacity station can be of the same standard or different systems.
• the load is represented by a typical factor of the number of connected users, i.e., the number of connected users indicates the change in macro base station load and the amount of load that can be absorbed after the hotspot station is activated. It should be noted that the technical solution described in the present invention is also applicable to the case where the load of the base station is represented by other factors such as the air interface resource occupancy rate, or the combination of any number of factors such as the number of connected users and the occupancy rate of the air interface resources. .
• the capacity station group of all the capacity stations in the coverage range is S t .
• N (N ⁇ l) of the dormant capacity stations (for example, hotspot stations) will participate in the activation decision, respectively: , 3 ⁇ 4, ..., !3 ⁇ 4, and represent these with the capacity station group S
• S can be equal to S t .
• Tal can also be S t .
• the subset of tal that is, the macro base station can allow all the hotspot stations in the coverage state to participate in the activation decision, or select some hotspot stations whose coverage is in the sleep state to participate in the activation decision, for example, the macro base station is executing.
• the hotspot station activates the decision process, refer to the long-term load statistics of each hotspot station in the dormant state. If the long-term load statistics are displayed in the next time, a hotspot station will maintain a very low load for a long time after activation. Horizontally, or only capable of maintaining a medium to high load of 4 ⁇ short time, the macro base station excludes the hot spot station from the capacity station group S.
• a hotspot station that is in a dormant state but does not belong to the capacity station group S within the coverage of the macro base station will remain in a dormant state and will not participate in the activation decision.
• the load here includes at least the following factors: Number of connected users.
• FIG. 1 a flow chart of a method for activating a capacity station according to an embodiment of the present invention.
• the method is implemented as an overlay station or OAM (Operation Management and Maintenance Module).
• OAM Operaation Management and Maintenance Module
• S101 Send first activation control information to the capacity station, where the first activation control information is used to enable And the capacity station sends a pilot signal to a user in a linked state with the coverage station by using the first transmit power, and the capacity station belongs to the coverage station;
• S102 Receive a first measurement result of the pilot signal by the user, and determine, according to the first measurement result, a capacity station that needs to be activated to meet a system requirement;
• S103 sending activation information to the capacity station that needs to be activated, so that the capacity station that needs to be activated is activated and operates at the first transmission power;
• S104 if the capacity station that needs to be activated to meet the system requirement cannot be selected according to the first measurement result, send, to the capacity station, second activation control information, where the second control information is used to cause the capacity station to use the second transmission. Transmitting a pilot signal to a user in a linked state with the overlay station; receiving a second measurement result of the pilot signal by the user, determining, according to the second measurement result, the capacity station that needs to be activated; The capacity station that needs to be activated transmits activation information such that the capacity station that needs to be activated is activated to operate at the second transmission power;
• the first control transmit power is less than the second transmit power.
• the activation information is sent to all the capacity stations participating in the activation decision of the coverage station and the activated capacity station is Maximum transmit power is working.
• the capacity station that needs to be activated may be comprehensively determined according to the first measurement result and the second measurement result, for example, calculating a difference between the first measurement result and the second measurement result, and determining, according to the difference value, the capacity station that needs to be activated The user who is in need of activation is activated and the user is located in the center of the cell.
• the capacity station has more transmission power levels, if the coverage station does not select a suitable capacity station that needs to be activated, the transmission power of the pilot signal is sequentially adjusted, and the measurement result of the pilot signal is sequentially determined according to the user. The selection of the capacity station needs to be activated until a suitable capacity station that needs to be activated is determined. It can be considered that the above steps are repeated at different transmission powers. If the transmission power of each level fails to select a capacity station that needs to be activated to meet the system requirements, then the activation information is transmitted to all the capacity stations participating in the activation decision of the coverage station and activated. The latter capacity station operates at its maximum transmit power.
• the pilot station transmits the pilot signal in a power-increasing manner to perform capacity station activation, and determines a suitable transmission power according to the measurement of the pilot signal by the user, so that the capacity station may work below after activation.
• the transmission power of these capacity stations can be preferentially increased to the maximum level to further absorb the load.
• Embodiment 1 of the present invention introduces a cell activation scheme in which both a macro base station and a hotspot station are EUTRAN base stations.
• Step 1 When the number of connected users of the macro base station exceeds the preset threshold c teesh .
• the macro base station When ld (first threshold), the macro base station notifies the hotspot station in the capacity station group S to &.
• the pilot power level of w transmits the pilot signal of T time, and can also send a synchronization signal (the hotspot station stops transmitting after T time is sent, returns to the sleep state), and configures the pilot of the macro base station connected state to send the hotspot station in S. The signal is measured and reported.
• the sum is just less than the preset threshold second threshold Cth rcsh . ld (i.e., the macro base station by subtracting the total number of users currently connected state before the M-1 corresponding to the pico station after a d- sum greater than a preset threshold C thrcsh. i), then the M alternatively hot pico station activation Station, and with the capacity station group s wake — up — ( s wake — up is a subset of the capacity station group S), go to step 3; if M is not selected, that is, the total number of users of the macro base station currently connected state minus the capacity
• the C ⁇ and sum of all hotspot stations in station group S are still greater than the preset threshold.
• Step 3 If the Ci_M corresponding to the Mth hotspot station of the selected M hotspot stations is greater than the preset threshold third threshold C teesh . Ld 2 , then the macro base station activates the hotspot station in the capacity station group S wake — up and Let it work at &. The pilot power transmission level of w , the other hotspot stations in the capacity station group S continue to remain in a dormant state, go to step XI; if the M hotspot stations in the selected M hotspot stations correspond to
• Step 4 The macro base station notifies the hotspot station in the capacity station group S wake - up i to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after T time is sent, and returns to the sleep state) and configure the macro base station to a user connected state Swake - up - pico station pilot signal transmitted measurement report, proceeds to step five.
• the W hotspot stations are used as activated alternative hotspot stations, and represented by the capacity station group S wake — up — 2 (S wake — up — 2 is a subset of the capacity station group S), go to the step 6; If W is not selected (ie, the appropriate W is never selected), that is, the total number of users in the current connected state of the macro base station minus the d, 2 sum of all hotspot stations in the capacity station group S wake — up i is still greater than the pre- Set the threshold C teesh . Then go to step seven.
• Step 6 The macro base station activates the hotspot station in the capacity station group S wake — up 2 and makes it work at the pilot power transmission level of P max , and the other hotspot stations in the capacity station group S continue to remain in the sleep state, go to step ten One.
• Step 7 The macro base station notifies the hotspot station in the capacity station group S to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after T time is sent, returns to the sleep state), and configures the macro base.
• the station connected state user reports the pilot signal sent by the hotspot station in S, and goes to step 8.
• the Q hotspot stations will be the activated alternative hotspot stations, and the capacity station group S wake — up — 3 (S wake _ up _ 3 is the capacity station group subset S) is represented, to step 9; Q is selected if not, i.e., the macro base station by subtracting the total number of users currently connected state capacity station set S corresponding to the station all hotspots d, 3 is still greater than the preset threshold the sum of C teesh . Ld goes to step ten.
• Step 9 The macro base station activates the hotspot station in the capacity station group S wake — up 3 and operates it at the pilot power transmission level of P max , and the other hotspot stations in the capacity station group S continue to remain in the sleep state, go to step ten One.
• Step 10 The macro base station activates all hotspot stations in the capacity station group S and has it operate at the pilot power transmission level of P max , and proceeds to step XI.
• Step 11 When the number of connected users of the macro base station is further increased and exceeds the preset threshold first threshold c thrcsh .
• the macro base station if there is a hotspot station with active but not full power transmission in the coverage area, the macro base station notifies the hotspot stations that are activated but not full power to increase the pilot power to the maximum transmission level; if all the macro base station load range has been After the activated hotspot stations all work at the maximum emission level of the pilot power, the number of connected users of the macro base station is still higher than the first threshold c teesh .
• the macro base station repeats steps 1 to 10 to perform the hotspot activation process until all hotspot stations in the coverage of the macro base station are in an active state and operate at the maximum pilot power emission level.
• steps 1 through 6 are repeated.
• the macro base station selects an alternative hotspot. After the station capacity group, all the hotspot stations in the capacity station group are activated, and the hot station is not able to efficiently absorb the macro base station load for verification.
• Embodiment 2 of the present invention discloses a cell activation scheme in which a macro base station is a UTRAN base station and a hotspot station is an EUTRAN base station.
• the macro base station provides basic network coverage, and the hotspot station is deployed in the hotspot area within the coverage of the macro base station for capacity enhancement and is completely covered by the macro base station.
• the hotspot station activation may be applied by applying the technical solution of the present invention.
• the hotspot station uses two pilot transmit powers during the activation decision process, which are respectively
• P lc3W and P max where &. w is a preset power level lower than P max , and P max may be the hot spot station pilot maximum transmission power.
• Step 1 When the OAM detects that the number of connected users of the macro base station exceeds the preset threshold C thrcsh . When ld ,
• the OAM notifies the hotspot station in the capacity station group S to &.
• the pilot power level of w transmits the pilot signal of T time and the synchronization signal (the hotspot station stops transmitting after T time is sent, returns to the sleep state), and notifies the macro base station; the macro base station configures the connection of the connected state user to the hotspot station in S.
• the frequency signal is measured and reported to go to step 2.
• the M hotspot stations are used as the activated alternative hotspot stations, and represented by the capacity station group S wake — up — (S wake — up i is a subset of the capacity station group S), go to step 3;
• the total number of users in the current connected state of the macro base station minus the Ci, l corresponding to all hotspot stations in the capacity station group S is still greater than the preset threshold C teesh . Then go to step seven.
• Step 3 If the Mth hotspot station of the selected M hotspot stations corresponds to d_ is greater than a preset threshold (third threshold) Cth resh . Ld 2 , then the OAM activates the hotspot station in the capacity station group Swake_up_1 and operates it at the pilot power transmission level of P tow , and notifies the macro base station of the state transition of the hotspot station and the pilot power information, in the capacity station group S The other hotspot stations continue to sleep, and go to step 11; if the Ci_M corresponding to the Mth hotspot station of the selected M hotspot stations, l is smaller than the preset threshold C teesh . Ld 2 , then go to step four.
• a preset threshold third threshold
• Step 4 The OAM notifies the hotspot station in the capacity station group S wake - up i to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after T time, returns to the sleep state), And the macro base station is notified; the macro base station configures the connected state user to measure and report the pilot signal sent by the hotspot station in the S wake - up , and proceeds to step 5.
• the number of macro base station users of the event denoted as d, 2 , and sort the hotspot stations in descending order of d, 2 .
• Step 6 OAM activates the hotspot station in the capacity station group S wake — up 2 and it works at P max
• the pilot power transmission level is notified to the macro base station by the state transition of the hot spot station and the pilot power information, and the other hotspot stations in the capacity station group S continue to remain in the sleep state, and go to step 11.
• Step 7 The OAM notifies the hotspot station in the capacity station group S to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after the T time is sent, returns to the sleep state), and notifies the macro base station.
• the macro base station configures the connected state user to measure and report the pilot signal sent by the hotspot station in S, and goes to step 8.
• the number of macro base station users of the event denoted as d, 3 , and sort the hotspot stations in descending order of d, 3 .
• the sum is just less than the preset threshold Cth rcsh .
• Ld — i that is, the total number of users in the current connected state of the macro base station minus the Ci— m corresponding to the previous Q-1 hotspot stations, and the sum of 3 will be greater than the preset threshold C teesh .
• the Q hotspot stations will be As an activated alternative hotspot station, and represented by the capacity station group S wake — up — 3 (S wake — up 3 is a subset of the capacity station group S), go to step IX; if Q is not selected, the macro base station The total number of currently connected users minus the Ci corresponding to all hotspots in the capacity station group S, and the total sum is still greater than the preset threshold.
• Step 9 The OAM activates the hotspot station in the capacity station group S wake — up 3 and operates it at the pilot power transmission level of P max , and notifies the macro base station of the state transition and pilot power information of the hot spot station, the capacity station group The other hotspot stations in S continue to sleep, go to step 11.
• Step 10 The OAM activates the hotspot station in the capacity station group S and operates it at the pilot power transmission level of P max , and notifies the macro base station of the state transition of the hotspot station and the pilot power information, and proceeds to step XI.
• Step 11 When the number of connected users of the macro base station is further increased and exceeds the preset threshold C teesh .
• the OAM notifies the hotspot stations that are activated but not full power to increase the pilot power to the maximum emission level, and the hotspot station The pilot power information is notified to the macro base station; if all the activated hotspot stations in the coverage of the macro base station are working at the maximum pilot power emission level, the number of connected state users of the macro base station is still higher than Then, the OAM and the macro base station repeat steps 1 to 10 to perform the hotspot activation process until all the hotspot stations in the coverage of the macro base station are in an active state and operate at the maximum pilot power emission level.
• steps one through six are repeated.
• the threshold C thrcsh is preset. If ld 2 is small or 0, then after OAM selects the candidate hotspot station capacity group, all the hotspot stations in the capacity station group are activated, and the hot station is not able to efficiently absorb the macro base station load.
• the macro base station when the hotspot station only transmits the pilot signal and the synchronization signal, the macro base station does not switch the connected state user to the hotspot station.
• the network scenario in the third embodiment of the present invention is as follows:
• the base station A on the frequency point fl provides basic network coverage for a certain area, and the base station B/C/D on the frequency point f2 overlaps with the base station A, and the base station A and the base station B /C/D can be a heterogeneous base station or a homogeneous inter-frequency point base station. All or part of the base stations in the base station B/C/D are in a dormant state for energy saving. When the load of the base station A is high, all or part of the base station B/C/D may be in a dormant state by using the technical solution proposed by the present invention.
• the base station is enabled to operate at the appropriate pilot transmit power level while ensuring that the load on base station A drops to an appropriate level.
• the threshold C thresh is preset.
• all the base station capacity stations on the frequency point f2 that overlap with the base station A and are in a dormant state are S t .
• N (N ⁇ l) sleeping stations will participate in the activation decision, namely: HI, H2, ..., HN, with the capacity station group S indicating these frequency points f2 that will participate in the activation decision Base station on.
• S can be equal to S t .
• Tal can also be S t .
• the ta subset may cause all the base stations on the frequency point f2 that overlap with the base station A to be in a dormant state to participate in the activation decision, or may only select the overlap coverage with the base station A on the frequency point f2 and be in a dormant state according to some algorithms.
• Part of the base station participates in the activation decision, for example, before performing the base station activation decision process, the reference frequency
• a base station that overlaps with base station A at frequency point f2 and is in a dormant state but does not belong to capacity station group S will maintain a dormant state and not participate in an activation decision.
• the load here includes at least the following factors: Number of connected users.
• Step 1 When the OAM detects that the number of connected users of the base station A exceeds the preset threshold Cth rcsh . At ld , the OAM notifies the base station in the capacity station group S to &.
• the pilot power level of w transmits the pilot signal of the T time and the synchronization signal (the base station stops transmitting after T time is sent, returns to the sleep state), and notifies the base station A; the base station A configures the pilot signal sent by the connected state user to the base station in the S. Perform the measurement report and go to step 2.
• the sum is just less than the preset threshold Cth rcsh .
• Ld is the total number of users in the current connected state of base station A minus the sum of d- 1 corresponding to the first M-1 base stations, and will be greater than the preset threshold Cthreshold.l, then the M base stations are used as active candidate base stations, and the capacity station group S wake — up — ( Swake_up_l is a subset of the capacity station group S), go to step 3; if M is not selected, that is, the total number of users in the current connected state of base station A minus the Ci corresponding to all base stations in the capacity station group S, l After the sum is still greater than the preset threshold Cthreshold_l, go to step 4.
• Step 3 If the Ci_M,1 corresponding to the Mth base station of the selected M base stations is greater than the preset threshold Cthreshold_2, the OAM activates the base station in the capacity station group Swake_up_1 and operates it at the pilot power transmission level of Plow, and Notifying the base station A of the state transition of the base station and the pilot power information, and the other base stations in the capacity station group S continue to remain in the dormant state, and go to step eight; If Ci_M, l corresponding to the Mth base station of the selected M base stations is smaller than the preset threshold Cthreshold_2, go to step 4.
• Step 4 The OAM notifies the base station in the capacity station group S to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of Pmax (the base station stops transmitting after the T time is sent, returns to the sleep state), and notifies the base station A; the base station A Configure the connected mode user to report the pilot signal sent by the base station in S, and go to step 5.
• the number of users of the base station A that switches the condition and reports the handover event is denoted as Ci, 2, and the base stations in the capacity station group S are sorted in descending order of Ci, 2.
• W is not selected, that is, the total number of users in the current connection state of base station A minus the Ci corresponding to all base stations in the capacity station group S, and the sum of 2 is still greater than the preset threshold Cthreshold_l, then go to step 7.
• Step 6 The OAM activates the base station in the capacity station group Swake_up_2 and operates at the pilot power transmission level of P max , and notifies the base station A of the state transition of the base station and the pilot power information, and proceeds to step 8.
• Step 7 The OAM activates the base station in the capacity station group S and operates it at the pilot power transmission level of P max , and notifies the base station A of the state transition and pilot power information of the base station, and proceeds to step 8.
• Step 8 When the number of connected users of the base station A is further increased and exceeds the preset threshold C teesh .
• the OAM if there is a base station that is activated but not full power transmitted in the base station overlapping with the base station A at the frequency point f2, the OAM notifies the base stations that are activated but not full power to increase the pilot power to the maximum emission level, and The base station pilot power information informs the base station A; if the frequency point f2 is equal to the base station A When all the activated base stations covered by the overlap are working at the maximum transmission power level of the pilot power, the number of connected users of the base station A is still higher than that of the C teesh .
• the OAM repeats steps 1 through 7, and performs a base station activation process until all base stations overlapping with the base station A at the frequency point f2 are in an active state and operate at a maximum pilot power transmission level.
• steps 1 through 3 are repeated.
• the preset threshold Cthreshold_2 is small or zero, then after the OAM selects the candidate base station capacity station group, all the base stations in the capacity station group are activated, and the base station A cannot efficiently absorb the load of the base station A. Do the inspection.
• the base station A on the frequency point fl provides basic network coverage for a certain area
• the base station B and the base station A on the frequency point f2 share the address and overlap
• the base stations A and B can It is a heterogeneous base station, and it can also be a homogeneous inter-frequency base station.
• the base station B is in a dormant state for energy saving.
• the base station B can be activated by using the technical solution proposed by the present invention, so that the base station B operates at an appropriate pilot transmit power level while ensuring that the load of the base station A falls. The right level.
• Step 1 When the OAM detects that the base station A load exceeds the preset threshold C thrcsh .
• the OAM activates the base station B and operates it at the pilot power transmission level of the P lQW , and notifies the base station A of the state transition and pilot power information of the base station B, and proceeds to step 2.
• Step 2 The base station A transfers part of the load to the base station B, so that the load of the base station A is lower than the preset threshold C teesh . Ld , and the load of base station B is lower than the preset threshold C thrcsh . Ld , go to step three.
• Step 3 If the load of the base station is further increased, and exceeds the preset threshold C teesh . Ld , and the load of base station B exceeds the preset threshold C teesh . Ld — , OAM notifies base station B to increase pilot transmit power Up to the P max level, and the base station frame's pilot power information is notified to the base station.
• the base station ⁇ uses more than two pilot transmission powers during the activation process, repeat steps one through three.
• the macro base station provides basic network coverage, that is, the coverage station, and the hotspot station is deployed in the hotspot station area within the coverage of the macro base station to perform capacity enhancement, that is, the capacity station, and is completely covered by the macro base station.
• capacity enhancement that is, the capacity station
• the hotspot station activation may be applied by applying the technical solution of the present invention.
• the macro base station and the hotspot station here can be of the same standard or different systems.
• S may be a capacity station group of all the capacity stations in the sleep state within the coverage of the macro base station, or may be the above-mentioned capacity station group Subset
• initialize n l, go to step two.
• Step 1 is optional.
• all the capacity stations that are in the dormant state are the capacity stations that need to participate in the activation judgment, and the macro base station or the OAM can refer to the capacity of each of the sleep states before performing the capacity station activation decision process.
• Long-term load statistics of the station If the long-term load statistics show that after a certain capacity station is activated for a long time, it will maintain a low load level of 4 ⁇ , or only maintain a medium-high load for a short time.
• the macro base station excludes the capacity station from the capacity station group S. A capacity station that is in a dormant state but does not belong to the capacity station group S within the coverage of the macro base station will remain dormant and will not participate in the activation decision.
• Step three OAM macro base station or receiving a measurement result transmitted from each user, selecting the candidate capacity station set S m (8 "1 is a subset of S m4) and a preset algorithm according to the measurement result reported by the user if the macro base station according to the pre
• Step 5 The macro base station or OAM activates all the capacity stations in the capacity station group S m and allows it to operate at the pilot power transmission level of P m+n 4, and proceeds to step eight.
• Step 6 The macro base station or the OAM notifies the capacity station in the capacity station group S m4 to transmit the pilot signal and the synchronization signal at the pilot power level of P m+n4 , and configure the pilot transmitted by the macro base station user to the capacity station in S m4 .
• the signal is reported and returned to step 3.
• Step 7 The macro base station or OAM notifies the capacity station group S.
• the capacity station in the middle transmits the pilot signal and the synchronization signal at the pilot power level of P N and configures the macro base station user pair S.
• the pilot signal sent by the medium capacity station is measured and reported.
• OAM macro base station or group of selected candidate capacity station Si (8 1 8 is a subset) of the macro base station according to the measurement result reported by the user and a preset algorithm. If the capacity station group Si exists, the macro base station or OAM activates all the capacity stations in Si and allows it to operate at the pilot power transmission level of the PN, go to step eight; otherwise, the macro base station or OAM activates S. In all capacity stations, and let it work at the PN's pilot power transmission level, go to step eight.
• Step 8 When the macro base station load is further increased and exceeds the preset threshold, if there is a capacity station with active but not full power transmission in the coverage area, the macro base station or OAM notifies the activated capacity stations that are not fully transmitted. Frequency power to maximum transmission level; if all activated capacity stations in the macro base station load range are operating at the maximum pilot power emission level, the macro base station load is still higher than By default, the macro base station or OAM repeats steps 1 through 7 to perform the capacity station activation process until all capacity stations within the macro base station coverage are active and operate at the maximum pilot power emission level.
• the capacity station when the macro base station or the OAM selects the candidate capacity station group Si (Si is a subset of S 0 ) according to the measurement result reported by the macro base station user and the preset algorithm, the capacity station may not be used.
• the efficiency of the capacity station 7 is loaded, and all the capacity stations in the capacity station group S1 are directly activated and allowed to work at the current pilot power transmission level, that is, step 4 can be removed in all the above steps.
• Step 6 The main steps of the technical solution are as follows:
• step one is optional.
• all the capacity stations are the capacity stations that need to participate in the judgment, that is, all the capacity stations form the first capacity station group S 0 by default.
• Step 2 If n ⁇ N, the macro base station or OAM notifies the capacity station group S.
• Step 4 The macro base station or OAM activates all capacity stations in the capacity station group Si, and let it work at the P pilot power transmission level, go to step 6.
• Step 5 The macro base station or OAM notifies the capacity station group S.
• the capacity station in the middle transmits the pilot signal and the synchronization signal at the pilot power level of P N and configures the macro base station user pair S.
• the pilot signal sent by the medium capacity station is measured and reported.
• OAM macro base station or group of selected candidate capacity station Si (8 1 8 is a subset) of the macro base station according to the measurement result reported by the user and a preset algorithm.
• Macro if the capacity station group Si exists
• the base station or OAM activates all capacity stations in Si and allows it to operate at the Pr ⁇ pilot power transmission level, go to step six; otherwise, the macro base station or OAM activates S. In all capacity stations, and let it work at the pilot power send level, go to step six.
• Step 6 When the macro base station load is further increased and exceeds the preset threshold, if there is a capacity station with active but not full power transmission in the coverage area, the macro base station or OAM notifies the capacity stations that activate but not full power to improve. Frequency power to maximum transmission level; If all activated capacity stations in the macro base station load range operate at the maximum pilot power level, the macro base station load is still higher than the preset threshold, then the macro base station or OAM repeats step one to step 7. Perform the capacity station activation process until all capacity stations within the coverage of the macro base station are active and operate at the maximum emission level of the pilot power.
• the macro base station or the OAM selects a candidate capacity station group according to the measurement result reported by the macro base station user and a preset algorithm, where the preset algorithm includes:
• the macro base station or the OAM counts the load conditions of the macro base stations that can be absorbed by the respective capacity stations when transmitting the pilots at the current power, sorts the capacity stations in descending order, and selects the first several or more capacity stations as the candidate capacity.
• the station group makes all the capacity stations in the capacity station group bear the load and just reduces the macro base station load to an appropriate level.
• the macro base station or OAM combines the amount of load that each capacity station can absorb when transmitting the pilot at the current power, the amount of load that can be absorbed when transmitting the pilot from the above power level, and the difference between the two, and selects the candidate capacity. Station group. For example, according to whether the load amount that can be absorbed by each capacity station when transmitting the pilot at the current power exceeds a certain threshold, the partial capacity station is roughly selected as a rough selection station group, and then according to each capacity station, the current power is transmitted.
• the difference between the amount of load that can be absorbed at the pilot and the amount of load that can be absorbed when the pilot is transmitted at the previous power level is selected from the group of coarsely selected capacity stations, so that all capacity in the group of candidate stations After the station bears the load, it just happens to reduce the macro base station load to an appropriate level.
• the capacity station transmits the pilot signal in a power-increasing manner according to the indication of the coverage station or the OAM, and the coverage station configures the user to report and report the pilot signal sent by the capacity station at different power levels, and each time the user reports
• the reported measurement results are analyzed and processed, so that on the one hand, the coverage of the coverage station that can be absorbed after each capacity station is activated can be determined, and on the other hand, the possible user distribution after the activation of the capacity station can be known, and the information of the two aspects is combined to cover
• the station or OAM can greatly improve the decision accuracy of the capacity station activation, avoiding the wrong capacity station being activated while activating the correct capacity station, thereby avoiding the waste of power and resources caused by the wrong activation of the capacity station and the user being Unnecessary mobility between the
• the embodiment of the present invention further provides a device system for implementing the above method, which is used to complete the above method.
• the method it can accomplish is as previously described.
• FIG. 2 a schematic diagram of a wireless communication system includes a capacity station and a coverage station, and the capacity station belongs to the coverage station, and the capacity station includes at least two levels of transmission power.
• (a) is a base station B/C/D of a heterogeneous or homogeneous inter-frequency point overlapping with the base station A
• (b) is a base station E of a heterogeneous or homogeneous inter-frequency point.
• the base station A on the frequency point fl provides a basic network coverage for the coverage area, and the base station E at the frequency point f2 is the capacity station.
• A is the coverage station and B/C/D/E is the capacity station.
• the macro base station in (C) provides a basic network coverage base station, which is an overlay station, and the hotspot station provides service upgrade or capacity enhancement and overlaps coverage with the coverage station as a capacity station.
• the overlay station is configured to send a plurality of activation control information to the capacity station, the plurality of activation control information causing the capacity station to transmit a pilot signal to the user in a power incremental manner, and receiving the user to the pilot a measurement result of the frequency signal, determining, according to the measurement result, a capacity station that needs to be activated to meet the system requirement, and transmitting activation information to the determined capacity station that needs to be activated;
• the capacity station is configured to receive activation control information of the coverage station, and send a pilot signal to the user in a manner of increasing transmission power until the coverage station determines a capacity station that needs to be activated to meet the system requirement, and is also used when in the sleep state.
• Receiving activation information sent by the coverage station and converting to an active state, and And the power of the pilot station transmits the pilot signal when the capacity station that needs to be activated determined by the coverage station sends the activation information.
• the embodiment of the present invention provides a base station, which is used as an overlay station, and can implement the processing of the overlay station in the foregoing method embodiment.
• the specific processing flow is described in the foregoing method embodiment.
• FIG. 3 a schematic structural diagram of a base station 30 according to an embodiment of the present invention is shown.
• the sending unit 301 is configured to send, to the capacity station that belongs to the base station, a plurality of activation control information, where the multiple activation control information is used to enable the capacity station to send a pilot signal to the user in a power increasing manner; 303.
• the receiving unit is configured to receive, by the user, a measurement result that is sent to the pilot signal, where the calculating unit is configured to determine, according to the measurement result of the pilot signal by the user, a capacity station that needs to be activated to meet the system requirement, and send the
• the unit 301 sends activation information to the capacity station that needs to be activated, so that the capacity station that needs to be activated in the sleep state is converted into an active state, and works when the capacity station that needs to be activated determined by the coverage station sends the activation information.
• the power of the pilot station to transmit the pilot signal.
• the further sending unit 301 is further configured to send, to the capacity station, first activation control information, where the first activation control information is used to enable the capacity station to send a pilot signal to the user at a first transmit power; 303 is further configured to receive a first measurement result of the pilot signal by the user, where the calculating unit 305 determines, according to the first measurement result, a capacity station that needs to be activated to meet a system requirement, where the sending unit 301 is The capacity station that needs to be activated transmits activation information such that the capacity station that needs to be activated is activated to operate at the first transmission power.
• the sending unit 301 is further configured to send second activation control information to the capacity station, where the second control information is used to make the The capacity station transmits a pilot signal to the user in the link state with the coverage station by using the second transmission power; the receiving unit 303 is further configured to receive the second measurement result of the pilot signal by the user, where the calculation unit 305 is Determining the need to be stimulated according to the second measurement result
• the transmitting unit 301 transmits activation information to the capacity station that needs to be activated such that the capacity station that needs to be activated is activated and operates at the second transmission power.
• the sending unit 301 is further configured to send configuration information to the home user, where the configuration information is used to enable the user to measure the received pilot signal and send back the measurement result.
• the calculating unit 305 when determining, according to the first measurement result, the capacity station that needs to be activated to meet the system requirement, may include:
• the M capacity stations are the capacity stations that need to be activated; otherwise, the capacity stations that need to be activated to meet the system requirements cannot be selected.
• the method further includes: if there are M capacity stations, the current load amount of the coverage station is subtracted from the M-1 After the load of the capacity station is integrated to be greater than or equal to the second threshold and the current load amount of the capacity station is less than or equal to the second threshold after subtracting all the load amounts of the M capacity stations, the M capacity The station is the capacity station that needs to be activated.
• Determining, by the calculating unit 305, the capacity station that needs to be activated according to the second measurement result includes: determining, according to the second measurement result sent by a user covered by each capacity station, a load amount borne by each capacity station; If there are Q capacity stations, the current load amount of the coverage station is subtracted from which the load of the Q-1 capacity stations is greater than or equal to the second threshold, or the current load amount of the capacity station is subtracted.
• the Q load stations of the Q capacity stations are less than or equal to the second threshold, and the Q capacity stations are capacity stations that need to be activated; otherwise, they cannot be selected to be full. The capacity station that the system needs to activate.
• the capacity station transmits the pilot signal in a power-increasing manner according to the indication of the coverage station, and the coverage station configures the user to perform measurement reporting on the pilot signal transmitted by the capacity station at different power levels, and performs measurement on the user.
• the measurement results of each report are analyzed and processed, so that on the one hand, the coverage of the coverage station that can be absorbed after each capacity station is activated can be determined, and on the other hand, the possible user distribution after the activation of the capacity station can be known, and the information of the two aspects is combined.
• the coverage station can greatly improve the decision accuracy of the capacity station activation, and activate the correct capacity station while avoiding the wrong capacity station being activated, thereby avoiding the waste of power and resources caused by the wrong activation of the capacity station and the user being Unnecessary mobility between the capacity station and the coverage station improves the overall energy savings of the network.
• a person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
• the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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• 2011
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• 2012
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